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  3. the shankandfoot system during walking is shown in the figure...

Question: the shankandfoot system during walking is shown in the figure...

Question details

The shank-and-foot system during walking is shown
in the figure to the right. A force J and a moment M
from the human body are transmitted to the knee joint
K. Mass of the shank is 3.75 kg and its weight S is
acting at point A. Mass of the foot is 0.75 kg and its
weight F is acting at point B. The resultant reaction
force R acts at H at an angle α as shown in the figure.
Given that the shank-and-foot system is in
equilibrium,
(a) Write down force equilibrium equations in the xand
y- axes.
(b) Write down the moment equilibrium equation about
the heel H.
(c) Calculate the reaction force R, angle α and moment M.
(Take the gravitational acceleration g = 10 m/s2)

Problem 3 The shank-and-foot system during walking is shown in the figure to the right. A force J and a moment M from the human body are transmitted to the knee joint K. Mass of the shank is 3.75 kg and its weight S is acting at point A. Mass of the foot is 0.75 kg and its weight F is acting at point B. The resultant reaction force R acts at H at an angle α as shown in the figure Given that the shank-and-foot system is in equilibrium, J 250 N K (-20 cm,40 cm) 45° A (-12 cm,24 cm) (a) Write down force equilibrium equations in the x- B (8 cm,8 cm) and y- axes (b) Write down the moment equilibrium equation about the heel H (c) Calculate the reaction force R. angle α and moment M (Take the gravitational acceleration g 10 m/s-) H (o,0) :O

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